IOL HAT - Industrial Sensor Connectivity for RPi

This Raspberry Pi HAT allows to connect industrial sensors and other devices that ar compatible with IO-Link to Raspberry Pi

Andreas Lau

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Description

For IoT projects and applications it is often required to aquire real world data (distance, humidity, filling level, etc.). Most sensors that connect to Raspberry Pi (e.g. over single wire interface) do the job, but are not ruggadized enough for long term use. For these applications, industrial sensors are perfect, but they lack easy connection to the Raspberry Pi.
One industry standard is IO-Link, with over 20,000 different device types (not only sensors but also small HMIs, buttons, signal lights, etc.) available. These smart devices use standardized communication. However, to connect them, a driver (hardware) and a communication stack (software) are needed.
The IOL HAT provides both hardware and software to connect to Raspberry Pi over SPI. It also features an API that can be accessed by the user application over binary TCP, so the user does not need to care about the details of the IO-Link protocol.
The project is featured on CrowdSupply!

Details

Please subscribe to my CrowdSupply campaign if you are interested in this project: www.crowdsupply.com/pinetek-networks/iol-hat

I built some prototypes of the IOL HAT and did testing (and also some video production). The project (software, examples, schematics) is open source, the content is available in the GitHub repo.

The stack is based on the RT Labs I-Link stack and runs on the Raspberry Pi. To meet the realtime requirements (not to run into stack timeouts), I reserved one core of the Raspberry for the stack, which turns out to work very well.

If you want to know how to connect to the IOL HAT, here's a video that explains the features: